Which hazard is indicated by DOT placards that show Class Number 6?

Which hazard is indicated by DOT placards that show Class Number 6?

• A. Corrosives
• B. Oxidizers
• C. Infectious substance hazards
• D. Explosives

Answer: (C)

DOT placards use class numbers to identify broad hazard groups, and Class 6 specifically covers poisonous materials and infectious substances. When a placard shows Class 6, it points to hazards within that group, and the infectious-substances subcategory (6.2) is the one most closely associated with infectious material. That’s why infectious substance hazards is the best answer here. The other options map to different classes—corrosives are Class 8, oxidizers are Class 5.1, and explosives are Class 1—so they wouldn’t be indicated by a Class 6 placard. In short, a Class 6 placard signals potential infectious agents requiring careful handling and containment.

DOT placards use class numbers to identify broad hazard groups, and Class 6 specifically covers poisonous materials and infectious substances. When a placard shows Class 6, it points to hazards within that group, and the infectious-substances subcategory (6.2) is the one most closely associated with infectious material. That’s why infectious substance hazards is the best answer here. The other options map to different classes—corrosives are Class 8, oxidizers are Class 5.1, and explosives are Class 1—so they wouldn’t be indicated by a Class 6 placard. In short, a Class 6 placard signals potential infectious agents requiring careful handling and containment.